Investigation of field emission characteristics and microstructure of nickel-doped DLC nanocomposite films by electrochemical deposition

doi:10.1016/j.physe.2012.08.023

	Investigation of field emission characteristics and microstructure of nickel-doped DLC nanocomposite films by electrochemical deposition
	Wang, Qing 1,2; Li, Songli 2; Wan, Shanhong 3
刊名	PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
	2012-09
卷号	46 页码:89-96
关键词	Amorphous carbon Electrolytes Electron emission Field emission Microstructure Morphology Nanocomposite films Nanocrystals Nanotips Nickel oxide Reduction Surface morphology Amorphous carbon matrix Electrochemical process Electron emission currents Emission current density Emission performance Field-emission characteristics Localized conduction Nickel incorporations
ISSN号	1386-9477
DOI	10.1016/j.physe.2012.08.023
英文摘要	The as-obtained nickel doped DLC films by the electrochemical process demonstrated the surface morphology of a nano-tip transformed to bumps with increasing nickel compound concentration in the electrolyte, simultaneously the sp(2)-C content greatly increased. Nickel was incorporated into highly cross-linked amorphous carbon matrix, forming the typical nanocrystalline/amorphous composite microstructure, which was in the form of element nickel, nickel hydroxide, and nickel oxide. Field emission performance showed that nickel incorporation effectively lowers the threshold field from 9.9 to 8.4 V/mu m at the electron emission current density of 1 mu A/cm(2), and greatly increased the emission current density from 21.88 to 163.89 mu A/cm(2) under 12.455 V/mu m for DLC film. The Raman and XPS measurements of the as-deposited films suggested that spatially localized conduction channels formed by the graphite-like sp(2)-carbon and metallic particles might be responsible for the electron emission in nickel-doped DLC films. (c) 2012 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[50772115] ; National Natural Science Foundation of China[50873047]
WOS研究方向	Science & Technology - Other Topics ; Physics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000312433400016
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/34858]
专题	能源与动力工程学院
通讯作者	Wang, Qing
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Nonferrous Met Mat, Lanzhou 730050, Peoples R China 2.Lanzhou Univ Technol, Sch Sci, Lanzhou 730050, Gansu, Peoples R China 3.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Wang, Qing,Li, Songli,Wan, Shanhong. Investigation of field emission characteristics and microstructure of nickel-doped DLC nanocomposite films by electrochemical deposition[J]. PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES,2012,46:89-96.
APA	Wang, Qing,Li, Songli,&Wan, Shanhong.(2012).Investigation of field emission characteristics and microstructure of nickel-doped DLC nanocomposite films by electrochemical deposition.PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES,46,89-96.
MLA	Wang, Qing,et al."Investigation of field emission characteristics and microstructure of nickel-doped DLC nanocomposite films by electrochemical deposition".PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES 46(2012):89-96.